一种基于局部运动特征的视频检索方法

在基于运动内容的视频检索中 ,视频中的局部物体运动常是用户关心的重点。在利用全局运动模型参数对运动估计的基础上 ,提出了一种从一般视频序列中提取局部物体运动矢量的方法 ,并以局部运动矢量场的方向直方图作为检索特征 ,实现了一个基于局部运动信息的视频检索系统。实验表明 :基于局部运动信息的检索机制使该系统能够较好地检索到符合人们主观理解的运动视频内容

Local motion information-based video retrieval method

In motion content based video retrieval, users are more concerned with the local object motion than the global camera motion. Based on parameters estimated from global motion model, local object motion information are extracted from general video sequences. The extracted local motion vector field is then used to produce a directional histogram, which is taken as the feature of the video retrieval system. Experimental results show that this local motion information retrieval system could effectively find clips that better match people's understanding of the video's motion content.